PVC Tangshan Sanyou SG‑3
PVC Tangshan Sanyou SG‑3
Material Introduction: PVC Tangshan Sanyou SG‑3 is polyvinyl chloride resin produced by suspension‑polymerization, normally supplied as white powder or white spherical granules. As a general‑purpose resin with high degree of polymerization, it adapts to various processing methods and endows finished products with favorable mechanical properties.
Main Applications
Rigid products: rigid pipes (especially large‑diameter pipes), special‑shaped profiles (door‑window profiles), boards, industrial profiles, valves, anti‑corrosion materials, etc.
Soft products: artificial leather, insulating layers for wires and cables.
Other fields: agricultural films, daily‑consumer goods (furniture, toys), packaging materials, etc.
Physical Properties
| Test Item | Test Standard | Unit | Reference Value / Range | Remarks |
|---|---|---|---|---|
| Average Degree of Polymerization | ‑ | P | 1250‑1350 or 1300±80 | |
| Viscosity Number | GB/T 3401 | ml/g | 127‑135 | |
| K‑Value | GB/T 3401 | ‑ | 71‑72 or 71‑73 | |
| Bulk Density | ‑ | g/ml | ≥0.42 or 0.50±0.04 | |
| Volatile Matter Content | ‑ | % | ≤0.40 | Including water |
| Sieve Residue (0.25 mm sieve) | ‑ | % | ≤2.0 | |
| Sieve Residue (0.063 mm sieve) | ‑ | % | ≥90 | |
| Fish‑eye Count | ‑ | pcs/400cm² | ≤40 | |
| Plasticizer Absorption | ‑ | g/100g resin | ≥25 | |
| Impurity Particle Count | ‑ | pcs/100g | ≤30 or ≤50 | |
| Whiteness (160℃, 10 min) | ‑ | % | ≥78 | Reference for superior grade |
| Residual Vinyl Chloride Monomer | ‑ | μg/g (ppm) | ≤10 (first‑grade reference) or ≤1 (superior‑grade reference) |
Processing Parameters
| Process Step / Parameter | Unit / Condition | Reference Value / Range | Remarks & Description |
|---|---|---|---|
| Material Pre‑treatment | ‑ | Normally no drying required | Proper drying shall be performed if moisture‑absorbed |
| Extruder Barrel Temperature | ‑ | Note: PVC is heat‑sensitive; thermal stabilizer must be added | |
| Feed Section | ℃ | 150‑160 | For reference; adjust according to formulation and equipment |
| Compression Section | ℃ | 160‑170 | For reference; adjust according to formulation and equipment |
| Metering Section | ℃ | 170‑180 | For reference; adjust according to formulation and equipment |
| Extrusion Die Temperature | ℃ | 175‑190 | For reference; adjust according to formulation and equipment |
| Injection Molding Barrel Temperature | ‑ | Note: PVC is heat‑sensitive; thermal stabilizer must be added | |
| Rear zone | ℃ | 150‑160 | For reference; adjust according to formulation and equipment |
| Middle zone | ℃ | 160‑170 | For reference; adjust according to formulation and equipment |
| Front zone | ℃ | 170‑185 (do not exceed 190 °C) | For reference; adjust according to formulation and equipment |
| Injection Nozzle Temperature | ℃ | 160‑175 | For reference; adjust according to formulation and equipment |
| Melt Temperature | ℃ | 175‑190 | Never exceed 210 °C to avoid decomposition |
| Injection Pressure | bar | up to 1500 | |
| Screw Speed | rpm | 20‑50 | Avoid high speed to prevent shear‑caused overheating |
| Mold Temperature | ℃ | 30‑60 | |
| Thermal Stability Reminder | ‑ | Stabilizer addition is mandatory | PVC tends to decompose under over‑heating or long‑time heat exposure. Sufficient high‑efficiency thermal stabilizer shall be added into formulation. |
Disclaimer: All above data is for reference only.
